Manifold Riser Spacer
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You have 30 days to request a return. All sale items are final sale.
The Sierra Manifold Riser Spacer helps create the correct spacer height between your engine manifold riser components for proper exhaust alignment.
Key Features
- Brand: Sierra
- Part name: Manifold Riser Spacer
- For use in marine exhaust system installations where a riser spacer is required
Product Compatibility
- Marine exhaust/muffler systems (engine exhaust routing)
- Stern drive exhaust installations that require a manifold-to-riser spacer (application details should be confirmed against your engine/exhaust elbow/manifold parts)
Product Details
- Manifold Riser Spacer (Sierra)
- SKU: 47-1908
- Quantity: Sold individually (each)
- Use with compatible manifold and elbow components listed for this spacer in exhaust system builds (confirm in your parts diagram/service manual).
Parts Desk Insights
Best Use Case: Use when rebuilding or updating an exhaust path where the manifold-to-riser spacing needs to match the original exhaust geometry.
Common Issues: Common causes of rework include mixing spacer and gasket thicknesses, misaligned mating faces, or reusing mismatched manifold/elbow gaskets—verify the correct mating components from the exhaust parts diagram before final assembly.
Related Products & Accessories
- Manifold Riser Spacer Kit (where listed for 18-1908K) - Browse the related manifold/elbow spacer and gasket items for your exhaust assembly.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.